<!DOCTYPE html>
<!--:
var v1=34;
var v2=51;
-->
<html lang="en" xmlns:html="http://www.beetl.io/html">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
hello ${add(v1,v2)}
<html:add a="${v1}" b="${v2}">
    看看${date()}:
</html:add>
</body>
</html>